Backpack briefcase



FIG. 1 is a top plan view of the backpack briefcase of the presentinvention showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is left side elevational view thereof; and,

FIG. 6 is a right side elevational view thereof.

The cross-hatched pattern shown on the drawings is meant to represent atextured fabric surface.

The ornamental design for a backpack briefcase, as shown and described.